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In this Nov. 9, 2011 photo a model displays a 110.03 carats Sun-Drop Diamond described as fancy vivid yellow, the highest color grading, by gemstone experts, at a Sotheby's preview show in Geneva, Switzerland. The world's largest known yellow diamond has been sold, Tuesday, Nov. 15, 2001 at an auction for over $10.9 million. (AP Photo/Anja Niedringhaus)
/ AP